/*
 * Copyright (C) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.to.aboomy.bannersample.indicator.magicindicator;

/**
 * 抽象的ViewPager导航器
 *
 * @since 2020-09-29
 */
public interface IpagerNavigator {
    /**
     * onPageScrolled 回调
     *
     * @param position position
     * @param positionOffset positionOffset
     * @param positionOffsetPixels positionOffsetPixels
     */
    void onPageScrolled(int position, float positionOffset, int positionOffsetPixels);

    /**
     * onPageSelected 回调
     *
     * @param position position
     */
    void onPageSelected(int position);

    /**
     * onPageScrollStateChanged 回调
     *
     * @param state state
     */
    void onPageScrollStateChanged(int state);

    /**
     * 当IPagerNavigator被添加到MagicIndicator时调用
     */
    void onAttachToMagicIndicator();

    /**
     * 当IPagerNavigator从MagicIndicator上移除时调用
     */
    void onDetachFromMagicIndicator();

    /**
     * ViewPager内容改变时需要先调用此方法，自定义的IPagerNavigator应当遵守此约定
     */
    void notifyDataSetChanged();
}
